JP2007198999A - Monitor device for piston and monitor method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a monitor device for a piston, which directly recognizes pistons in operation of an internal combustion engine, and also to provide a monitor method thereof. <P>SOLUTION: The device comprises: a lighting means 5 for lighting from a scavenging and exhausting port 2 of the internal combustion engine towards pistons 1, 22, 23; a photographing means 6 for photographing the pistons 1, 22, 23, through the scavenging and exhausting port 2; an adjusting means 8 for synchronizing photographing timing with the movement of the engine; and a processing means 9 for processing image information from the photographing means 6, wherein the device recognizes the pistons 1, 22, 23, through the port 2 during operation of the engine. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a piston monitoring device that detects an abnormality of a piston or the like and a monitoring method thereof.

  In general, as an example of inspecting a piston or the like of an internal combustion engine, a predetermined observation window is removed when the main engine and the internal combustion engine are stopped, a piston crown and a piston ring are observed through a scavenging port of the cylinder liner, and a cylinder liner is There is something to observe.

  As another example, when the main engine and the internal combustion engine are stopped, a person enters the engine and visually observes and measures the piston ring and the like, or the piston is removed and visually observed and measured. There is something.

  As another example, during operation of the internal combustion engine, the temperature of the cylinder liner is measured by a temperature sensor or the like, and indirectly monitored for abnormalities in the sliding of the cylinder liner and the piston ring.

In addition, there exists a thing of patent document 1, 2 as an apparatus and method which measures the temperature of a piston and the abrasion state of a piston ring with a sensor etc. during the driving | operation of an internal combustion engine.
JP-A-6-137163 JP 2003-129902 A

  However, since the apparatus and method for inspecting the state of the piston during the operation of the internal combustion engine as described above are for indirect observation through a sensor or the like, the piston during operation cannot be directly recognized. There is a problem that observation, measurement and monitoring of the piston during operation are significantly limited. Further, during the operation of the internal combustion engine, the piston is constantly moving at a high speed, so that there is a problem that the same part cannot be observed continuously at the same timing for a long time.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a piston monitoring apparatus and a monitoring method for directly recognizing a piston during operation of an internal combustion engine.

  The present invention includes an illumination unit that illuminates the piston from the scavenging and exhausting port of the internal combustion engine, an imaging unit that images the piston through the scavenging and exhausting port of the internal combustion engine, and an adjustment unit that synchronizes the timing of imaging with the motion of the internal combustion engine, And a processing unit that processes image information from the photographing unit, and is configured to recognize the piston through a scavenging / exhaust port during operation of the internal combustion engine.

  In this invention, you may provide the permeation | transmission window for observing a piston, and the cleaning means which removes the dirt of this permeation | transmission window.

  In this invention, you may comprise so that the timing of imaging | photography can be adjusted and the monitoring position of a piston can be changed.

  In the present invention, the processing means may be configured to measure the joint size of the piston ring from the image information, and the processing means may include image information when the driving engine is stopped and information when the driving engine is operating. The average temperature of the piston ring may be calculated by comparing with image information.

  In the present invention, the photographing means may be configured to photograph the piston ring, the piston crown, and the cylinder liner, or may be configured to observe gas blow, and further, a warning is given due to abnormality of the piston or gas blow. You may comprise so that information may be issued.

  The present invention relates to a piston monitoring method characterized by illuminating a piston of an internal combustion engine and taking a picture in synchronization with the movement of the internal combustion engine and processing the taken image information to recognize the piston.

  In the present invention, a transmission window for observing the piston may be provided, and dirt on the transmission window may be removed.

  In the present invention, the monitoring timing of the piston may be changed by adjusting the shooting timing.

  In the present invention, the piston ring abutment size may be measured from the image information, and the average temperature of the piston ring is calculated by comparing the image information when the driving engine is stopped and the image information when the driving engine is operating. You may do it.

  In the present invention, the piston ring, piston crown, and cylinder liner may be photographed, gas blow may be observed, and warning information may be issued due to an abnormality in the piston or gas blow.

  According to the above-described piston monitoring apparatus and monitoring method of the present invention, the illumination means illuminates the piston of the internal combustion engine, synchronizes with the motion of the internal combustion engine, images the piston by the imaging means, and processes the captured image information. Therefore, it is possible to directly recognize the piston during operation of the internal combustion engine and easily observe, measure, and monitor the piston during operation. Even when the piston is moving at a high speed during operation of the internal combustion engine, the adjustment timing is used to synchronize the shooting timing with the movement of the internal combustion engine. It is possible to achieve an excellent effect of being able to observe with

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a piston monitoring apparatus according to the present invention will be described with reference to the drawings.

  1 to 3 show embodiments of the present invention, and embodiments of the present invention will be described below with reference to the accompanying drawings.

  The piston monitoring device is applied to a uniflow-type internal combustion engine, and has a transmission window 4 attached to a wall surface 3 such as a scavenging pipe so as to face a scavenging port (scavenging / exhaust port) 2 of a cylinder liner 1; The illuminating means 5 arranged behind the transmission window 4 (on the side of the anti-internal combustion engine) so as to go to the scavenging port (scavenging / exhaust port) 2 of the cylinder liner 1 and the scavenging port (scavenging / exhaust port) 2 of the cylinder liner 1. The photographing means 6 disposed behind the transmission window 4 (on the side of the internal combustion engine), the adjusting means 8 such as the timing controller 7 for adjusting the light emission of the illumination means 5 and the photographing of the photographing means 6, A processing unit 9 such as a PC or an analysis device for processing image information is provided.

  The transmission window 4 is formed in a disk shape with a glass plate, and a cleaning means 10 for removing dirt on the transmission window 4 is provided at the center of the transmission window 4. The cleaning means 10 includes a wiper 11 extending in the radial direction of the transmission window 4 on the front surface (side surface of the internal combustion engine) of the transmission window 4, and the transmission window 4 so as to rotate the wiper 11 along the circumferential direction of the transmission window 4. It consists of a wiper drive unit 12 such as a motor provided behind (on the side of the anti-internal combustion engine), and is configured to remove dirt on the transmission window 4 by the rotation of the wiper 11. Here, the arrangement location of the transmission window 4 is not particularly limited as long as the transmission window 4 is arranged so as to face the scavenging port 2 of the cylinder liner 1.

  The illumination unit 5 includes a stroboscope 13 disposed substantially parallel to the wiper driving unit 12 of the cleaning unit 10 and a stroboscope controller 14 that controls the stroboscope 13. The stroboscope controller 14 is connected to the timing controller 7. It is connected. The illuminating means 5 is not limited to the stroboscope 13 as long as the object of the present invention is achieved, and other illumination means may be used.

  The photographing means 6 includes a CCD camera 15 disposed substantially in parallel with the wiper drive unit 12 of the cleaning means 10 and the stroboscope 13 of the illumination means 5, and a CCD camera controller 16 that is connected to the CCD camera 15 and controls the CCD camera 15. The CCD camera controller 16 is connected to the timing controller 7. Note that the photographing means 6 may be an analog camera that processes captured image information in an analog manner or a digital camera that internally digitizes captured image information as long as the object of the present invention is achieved. Further, as shown in FIG. 1, a recording means 17 such as a video recorder may be connected to the CCD camera controller 16 of the photographing means 6 so that the photographed images can be continuously recorded.

  The adjustment means 8 includes a target 19 attached to a flywheel 18 of the internal combustion engine and the like, and a proximity switch 20 that detects the movement of the internal combustion engine via the target 19 so as to send a signal of the internal combustion engine motion to the timing controller 7. The timing controller 7 emits signals to the stroboscope controller 14 of the illumination means 5 and the CCD camera controller 16 of the imaging means 6 based on the signal of the proximity switch 20, and the stroboscope 13 of the illumination means 5 emits light and the imaging means. 6 is synchronized with the operation of the internal combustion engine. Specifically, light emission and shooting are performed at the same crank angle every rotation based on a signal once per engine rotation. I am doing so. Further, the timing controller 7 of the adjusting means 8 is provided with a manual adjusting section 21 so that the light emission interval by the stroboscope 13 of the illumination means 5 and the photographing timing by the CCD camera 15 of the photographing means 6 can be adjusted manually. It has become.

  A processing means 9 such as a PC or an analysis device is connected to the CCD camera controller 16 to process a photographed image taken by the CCD camera 15, and based on the processed information, the piston crown 22, the piston ring 23, the cylinder liner 1, Gas blow (not shown) is monitored. The processing means 9 such as a PC or an analysis apparatus is provided with a monitor 24 for displaying the states of the piston crown 22, the piston ring 23 and the cylinder liner 1, and the piston crown 22, the piston ring 23, the cylinder liner 1 and the gas blower. When an abnormality is detected, a warning means 25 for issuing warning information such as an alarm or warning display is provided. Further, the processing means 9 such as a PC or an analysis apparatus can store a photographed image by a recording medium such as a CD or a recording means such as a hard disk.

  Hereinafter, embodiments of the piston monitoring method according to the present invention will be described.

  The piston monitoring method uses the above-described piston monitoring device, so that when the piston crown 22 and the piston ring 23 reach predetermined positions of the scavenging port 2 during operation of the uniflow type internal combustion engine, the illumination means 5 is used. The stroboscope 13 emits light to illuminate the piston crown 22 and the piston ring 23 through the transmission window 4 and the scavenging port 2, and at the same time, the image is taken by the CCD camera 15 of the photographing means 6, and the piston crown 22, the piston ring 23 and further the scavenging. Image information of the cylinder liner 1 around the port 2 is acquired, and the piston crown 22, piston ring 23, and cylinder liner 1 are recognized. Here, the piston monitoring device is arranged on the scavenging port 2 side of the cylinder liner 1, thereby observing gas blow (return) to the scavenging chamber (not shown) of the combustion gas. When only the piston crown 22, the piston ring 23, and the cylinder liner 1 are observed, the observation may be performed not only through the scavenging port but also through the exhaust port.

  Subsequently, by acquiring the photographed image, the processing means 9 displays the photographed image information on the monitor 24 or the like, and the state of the piston crown 22 during the operation period due to the state of carbon adhesion to the piston crown 22, scratches, breakage, etc. The abnormality of the piston ring 23 such as coating peeling is directly observed and monitored. Further, when an abnormality is detected in the piston crown 22, the piston ring 23, the cylinder liner 1 and the gas blow, the warning means 25 issues an abnormality.

  Here, the processing means 9 has a processing method shown in the flow of FIG. 2. In this processing method, after obtaining a captured image during operation of the operating engine (step S 1), the image information is processed (step S 2). ) To measure the joint size (seam size) 23a of the piston ring 23 (step S3), and calculate the wear amount of the piston ring 23 based on the change of the joint size 23a (step S4). Further, it is compared whether or not the wear amount of the piston ring 23 is within the allowable range (step S5), and if it is within the allowable range, the fact that it is normal is displayed on the monitor 24 or the like (step S6). If so, a warning means 25 such as an alarm is issued to indicate an abnormality (step S7).

  Further, the processing means 9 has another processing method shown in the flow of FIG. 3. In this processing method, a captured image obtained when the operating engine is stopped (during cold zone) is acquired in advance (step S 11) The information is subjected to image processing (step S12), and the joint size (seam size) 23a of the reference piston ring 23 is measured (step S13), and further, a captured image during operation of the driving engine (in the tropical time) is acquired (step S14). ), Image processing is performed on the image information (step S15), and the joint size (seam size) 23a of the piston ring 23 during operation is measured (step S16). Data during operation of the operating engine (tropical time) is compared (step S17), and the average temperature of the piston ring 23 is calculated based on the linear expansion coefficient of the piston ring 23 (step S18). Further, whether or not the average temperature of the piston ring 23 is within the allowable range is compared (step S19). If the average temperature is within the allowable range, the fact that it is normal is displayed on the monitor 24 or the like (step S20). If so, a warning means 25 such as an alarm is issued to indicate an abnormality (step S21).

  Thus, according to the embodiment of the present invention, the illumination means 5 illuminates the pistons (piston crown 22 and piston ring 23) of the internal combustion engine, and the imaging means 6 images the piston in synchronization with the movement of the internal combustion engine. Since the captured image information is processed by the processing means 9, it is possible to directly recognize the operating piston of the internal combustion engine and easily observe, measure and monitor the operating piston. Further, even when the piston (piston crown 22) is moving at high speed during operation of the internal combustion engine, the adjustment means 8 synchronizes the shooting timing with the movement of the internal combustion engine. It can be continuously observed at the same timing. Furthermore, the change in the state of the piston during the operation period due to the carbon adhesion to the piston (piston crown 22) can be observed from the captured image information, and the piston (piston ring 23) can be damaged, broken, Even when an abnormality such as coating peeling occurs, the abnormality of the piston can be directly recognized from the image information taken, and the abnormality can be found at an early stage.

  When the cleaning means 10 removes the dirt of the transmission window 4, the transmission window 4 becomes dirty due to the operation of the internal combustion engine. The piston crown 22, the piston ring 23, the cylinder liner 1, and the transmission window 4 for observing the piston such as gas blow are provided. Since dirt can be appropriately removed by cleaning even under circumstances, it is possible to recognize the operating piston of the internal combustion engine continuously for a long time, and to more easily observe, measure and monitor the operating piston.

  If the monitoring position of the piston such as the piston crown 22, the piston ring 23, the cylinder liner 1 or the like can be changed by adjusting the shooting timing, the monitoring position of the piston can be set to a desired position (crank angle). It is possible to appropriately recognize the piston in the interior, and more easily observe, measure, and monitor the piston in operation.

  When the processing unit 9 measures the joint size 23a of the piston ring 23 from the image information, the amount of wear of the piston ring 23 can be easily calculated by the change of the joint size 23a.

  The processing means 9 compares the image information when the driving engine is stopped and the image information when the driving engine is operating, and calculates the average temperature of the piston ring 23. Thus, an abnormality such as when an abnormality occurs in the sliding of the piston ring 23 can be detected early.

  When the photographing means 6 photographs the piston ring 23, the piston crown 22, and the cylinder liner 1, it directly recognizes the piston ring 23, the piston crown 22, and the cylinder liner 1 during the operation of the internal combustion engine, and the piston ring 23 and the piston that are in operation. Observation, measurement, and monitoring of the crown 22 and the cylinder liner 1 can be easily performed.

  When gas blow is observed, gas blow can be directly recognized during operation of the internal combustion engine, and gas blow during operation can be easily observed, measured, and monitored. As a result, abnormal gas blowback can be detected at an early stage.

  If warning information is issued due to an abnormality in the piston crown 22, piston ring 23, cylinder liner 1, etc. or gas blow, an abnormality in the piston or the like can be notified early.

  The piston monitoring device and the monitoring method thereof according to the present invention are not limited to the above-described embodiments. The internal combustion engine is not limited to the uniflow type, and can recognize the piston from the scavenging exhaust port. Of course, other types may be used, and various modifications may be made without departing from the scope of the present invention.

It is a conceptual diagram which shows the example of embodiment of this invention. It is a flowchart which monitors the abrasion amount of a piston ring in the embodiment of this invention. It is a flowchart which monitors the average temperature of a piston ring in the embodiment of this invention.

Explanation of symbols

1 Cylinder liner (piston)
2 Scavenging port (scavenging and exhausting port)
DESCRIPTION OF SYMBOLS 4 Transmission window 5 Illumination means 6 Imaging means 8 Adjustment means 9 Processing means 10 Cleaning means 22 Piston crown (piston)
23 Piston ring (piston)
23a Auxiliary dimensions

Claims (16)

  Illuminating means for illuminating the piston from the scavenging and exhausting port of the internal combustion engine, photographing means for photographing the piston through the scavenging and exhausting port of the internal combustion engine, adjusting means for synchronizing photographing timing with the motion of the internal combustion engine, and the photographing means And a processing means for processing the image information, wherein the piston is recognized through the scavenging and exhausting port during operation of the internal combustion engine.   2. The piston monitoring apparatus according to claim 1, further comprising a transmission window for observing the piston and a cleaning means for removing dirt on the transmission window.   2. The piston monitoring device according to claim 1, wherein the imaging timing is adjusted and the monitoring position of the piston can be changed.   4. The piston monitoring apparatus according to claim 1, wherein the processing means is configured to measure a joint size of the piston ring from image information.   The processing means is configured to calculate an average temperature of the piston ring by comparing image information when the operating engine is stopped and image information when the operating engine is operating. The monitoring apparatus of the piston in any one.   2. The piston monitoring apparatus according to claim 1, wherein the photographing means is configured to photograph a piston ring, a piston crown, and a cylinder liner.   2. The piston monitoring apparatus according to claim 1, wherein the piston monitoring apparatus is configured to observe gas blow.   8. The piston monitoring apparatus according to claim 1 or 7, wherein warning information is issued when a piston or gas blow abnormality occurs.   A piston monitoring method characterized by illuminating a piston of an internal combustion engine and taking a picture in synchronization with the movement of the internal combustion engine, and processing the taken image information to recognize the piston.   The method for monitoring a piston according to claim 9, further comprising a transmission window for observing the piston, wherein dirt on the transmission window is removed.   The piston monitoring method according to claim 9, wherein the imaging timing is adjusted to change the monitoring position of the piston.   The piston monitoring method according to any one of claims 9 to 11, wherein the joint size of the piston ring is measured from image information.   The piston monitoring according to any one of claims 9 to 11, wherein the average temperature of the piston ring is calculated by comparing image information when the operating engine is stopped and image information when the operating engine is operating. Method.   The piston monitoring method according to claim 9, wherein the piston ring, the piston crown, and the cylinder liner are photographed.   The method for monitoring a piston according to claim 9, wherein gas blow is observed.   16. The method for monitoring a piston according to claim 9, wherein warning information is issued due to abnormality of the piston or gas blow.

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